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United States Patent | 5,744,555 |
Ames ,   et al. | April 28, 1998 |
A process for the production of elastomeric polypropylene is disclosed. The process entails contacting the propylene monomer neat or in an unreactive hydrocarbon solvent, with a catalyst in a recirculated, stirred reactor at a temperature of about 60.degree. to 80.degree. C. thereby producing elastomeric polypropylene. The reactor contents are in the slurry/solution phase and are essentially free of catalyst poisons. The reactor is capable of recirculating contents that are very viscous such that the reactor contents are well mixed while a portion of the contents of the reactor containing propylene, any solvent, and elastomeric polypropylene are continually removed by the use of a high viscosity pump to recover the elastomeric polypropylene.
Inventors: | Ames; William A. (Longview, TX); Holliday; Robert E. (Longview, TX); McKeon; Timothy J. (White Oak, TX); Pagan; Luis A. (Longview, TX); Scott; James H. (Longview, TX); Seeger; Horst K. (Longview, TX); Slemons; Gregory T. (Longview, TX); Statman; Max (Longview, TX); Vanderbilt; Jeffrey J. (Longview, TX) |
Assignee: | Eastman Chemical Company (Kingsport, TN) |
Appl. No.: | 344924 |
Filed: | November 25, 1994 |
Current U.S. Class: | 526/67; 422/135; 422/136; 526/68; 526/69; 526/70; 526/88; 526/348.2; 526/348.5; 526/351; 526/904 |
Intern'l Class: | C08F 002/06 |
Field of Search: | 526/67,68,69,70,88,348.2,348.5,351,904 422/135,136 |
4228263 | Oct., 1980 | Howard, Jr. et al. | 526/154. |
5205175 | Apr., 1993 | Garza et al. | 128/660. |
5207225 | May., 1993 | Oaks et al. | 128/660. |
5318027 | Jun., 1994 | Fukui | 128/660. |
5328666 | Jul., 1994 | Amano et al. | 422/138. |
Foreign Patent Documents | |||
0 409 492 A1 | Jan., 1991 | EP. |